Lock



April 25, 1933. E N g. 1,905,639

LOCK

Filed Sept. 6, 1929 2 Sheets-Sheet l E. N. JACOB] April 25, 1933.

LOCK

Filed Sept. 6,, 1929 2 Sheets-Sheet 2 Patented Apr. 25, 1933 UNITED STATES error EDWARD N. JACOBI, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO BRIGGS & STRATTQN CORPORATION, OF MILWAUKEE, WISCONSIN, A CORPORATION ,OF DELAWARE LOCK Application filed September This invention relates to certain new and useful improvements in locks and refers more particularly to that type of lock having a scribed wherein the usual key cooperates to prevent movement of the cylinder to its posiion with respect to the mounting member at which it may be withdrawn.

Another object of this invention resides in the provision of yieldable means carried by the lock cylinder and movable to a position limiting rotation of the cylinder upon insertion of the regular key.

And a further object of this inventionresides in the provision of a special key by which the tumblers of the cylinder may be retracted without moving the yieldable means to operative position whereupon the cylinder may-be moved to its position at which it is removable from the mounting member.

lVith the above and other objects in view which will appear as the description proceeds, my inventionresides inthe novel con- 7 struction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the hereindisclosed invention may be made as come within the scope of the claims. 7 r In the accompanying drawings, I have illustrated one complete example of the physical embodimentof my invention constructedaccording to the best mode I have so far devisedfor the practical application of the principles thereof, and in which:

Figure 1 is an elevational view with parts broken away and in section, of a lock embodying my invention;

' gagement of a plurality of locking-tumblers groove 18 is provided diametrically opposite 6, 1929. Serial No, 390,728.

Figure 2 is a'fragmentary, perspective view of the outer end of the mounting member;

Figure 3 is a perspective view of the cylinder'with a portion thereof broken away and with the regular key inserted; Figure 4 is a fragmentary view similar to Figure 1 illustrating the position of the parts when the special key is inserted;

Figure 5 is a cross sectional view taken through Figure 4 on the plane of' the line Figure 6 is a fragmentary top plan view with a portion thereof broken away and with the special key inserted; V 1

Figure 7 is a View similar to Figure 6 with the regular key inserted; and

Figures 8 and 9 illustrate the regular and special keys, respectively.

Referring now more particularly to the accompanying drawings, in which like numerals designate like parts throughout the several views, the numeral 10 represents the mounting member of my improved lock structure, having a longitudinal bore 11 counterbored at its outer end 12 and pro- 75 vided with a reduced bore 13 at its inner end.

A look cylinder 14- is'rotatably mounted in the bore 11 of the mounting member and is normally secured against rotation by the en- 15 in a longitudinal groove 16 communicating with the bore 11 and extending inwardly from the counterbore 12, the tumblers being I retractable to free the cylinder for rotation and the performance of its locking functions, bythe insertion of a key 17. To accommodate the movement of the lower ends of look-- ing tumblers incidental to insertion and with-1' drawal of the key, a second longitudinal the groove 16. I 7 r v The inner end of the lock cylinder is nonrotatably connected with an-actuating ele-, ment having its reduced end 20 projected through the bore 13, to provide means for imparting th'e'locking movement of the cylinder to any desired mechanism; 7 v l The cylinder 14, after being assembled with the mounting member, is secured-there in against longitudinal movement' by theen- 1 00 7 gagement of a pin 21 carried by the mounting member, in an annular groove 22 formed in the cylinder adjacent its inner end, the engagement of the pin in the groove, however, having no effect upon the rotation of the cylinder in the performance of its locking functions. 7 a

To permit the pin 21 to be engaged and disengaged with the annular groove 22 duringassembly and withdrawal of the cylinder from-the mounting member, that portion of the cylinder between the annular groove and its inner end is longitudinally slotted, as at 23, to form an entrance to thegroove. The groove and the slot thus together comprise a bayonet slotthrough which the pin may be passedxwhenever the cylinder is turned to align the slot-with the pin 21. It is, however, desirable that the alignment of the slot 23 with the pin 21 should not take place within the normal limits of movement of the cylinder, and therefore the means defining the normal limits of movement are so arranged that under certain circumstances when it is desired to withdraw the cylinder, it

may be moved beyond one of its normal lim-.

its of movement to effect the'desired alignment.

The means for limiting the rotation of the cylinder'comprises mounting member stops or abutments with which cylinder carried stops-or ab-utments cooperate. The mounting member stops are formed by the ends 24 and 25 of a projection 26 extended from the bottom of-the counterbore 12 and forming;

acontinuation of the bore-11, the end 25 being a continuation of "one side of the longitudinal tumbler groove 16 and the end-24 beingspaceda few degrees in a clockwise directionfrom the corresponding side of the tumbler groove 18. The width of the projection 26 is such that its forward end engages the rearwall of an enlarged head 27 formed on the cylinder from which a portion 28 projects rearwardly throughout approximatelyQO degrees, sothat the ends 29 and 30 ofthe rearward projection form abutments which lie in the path of and are engageable with the mounting member stops 2etand 25, respectively. 1

. The engagement of the abutment 29 with thestop 24, limits the clockwise rotation of the cylinder whenit reaches its unlocked position, which is approximately 90 degrees from. its locked position and thus defines one i of the normal limits of movement of the cylinder.v Theengagement of theabutment 30 with the stop, 25, however, does :not define, the other limit of normal movement, but an rests counterclockwise rotationaof the cylinder when itreaches the position aligning its bayonet slot with the pin 21 to permit withdrawal ofthe cylinder. This-position is beyond the .limit of normal counter-clock-- wise movement, and to normally prevent the securely fixed in a groove 35 formed in theenlarged cylinder head 27; The groove 35 is increased in width, as at 36, to accommodate aXial movement of the end of the spring which carries the lug 32, and extends beyond the end 30 of the projection 28, a distance equal to the width of the tumbler groove 16 to terminate, as at 37, in line with the stop or abutment 25. The bottom of the enlargement 36 of the groove between the abutment 30 and its end 37 is flattenechas at 38, to rece1ve the lug 32, and extends-to a by the key 17. 1

When the spring 33 is in its natural position, it lies flat against the forward straight wall 39 of the groove35 and the lug 32 lies behind the shoulderformed by-the end--37 of the groove out of the path of the stop or abutment 25, but upon insertion of the regularkey17 it is moved inwardlyby the en-- gagement of an abrupt step 40 on the regular key, with an ear ll extended downwardly from the lug 32 into the-key slot 42 which communicates with the fiattedportion 38, and into the path of the step on the key, when the key reaches its fully inserted position, It will be noted that the projection 41 on "the lug 32, by its engagement in the keyslot, guides the movement of the lug and also relieves the spring 33 of allstress incidental to tendency to turn the cylinder in a counterclockwise. direction through the key 17, .by

imparting such stress directly to the cylinturned in a counter-clockwise direction until its abutment 30 engages the abutment or stop 25. At this time the bayonet slot 23 will be aligned with the pin 21 making. it possible to withdraw'the cylinder'by impose ing an outward stress on the key.

- From the foregoing description, taken in connectionwith the accompanying.drawings; it will be-readily apparent to those skilled in the art to which an invention ofthe :char'ac-f ter described appertains, thatl provide novel mounting member, said means becoming disn 8. In a lock'fsjtructure ofthe char acter'de-' means for removably securing a lock cyl-' inder in its mounting member which utilizes the insertion of the regular key to prevent movement of the cylinder to a position permitting its withdrawal and wherein the use of a special key frees the cylinder for rotation and permits the same to be turned to its position at which the same can be withdrawn from the mounting member.

IVhat I claim as my invention is 1. In a lock of the character described, a mounting member, a lock cylinder in the mounting member being movable therein in the performance of its normal locking functions upon insertion of aproper key, cooperating means carried by the mounting member and the lock cylinder for releasably securing the lock cylinder in the mounting member, said means becoming inoperative upon movement of thelock cylinder to a predetermined position, and means for preventing movement of the lock cylinder to said predetermined position, said means becoming operative upon insertion of the key.

2. In a lock of the character described,

a mounting member, a lock cylinder movable in the mounting member in the performance of its normal locking functions, tumblers carried by the cylinder and releasable upon the insertion of a proper key, cooperating means carried by the mounting member and the lock cylinder for releasably securing the lock cylinder in the mounting member, said means becoming inoperative upon movement of the lock cylinder to a predetermined position, and cooperating means carried by the mounting member and the lock cylinder for preventing movement of the lock cylinder to said predetermined position, one of said means being movable to operative position by the insertion of the key.

3. In a lock device of the character described. a mounting member, a lock cylinder adapted to receive a key and being movable in the mounting member upon the insertion of the key, means for releasably maintaining the lock cylinder assembled with the mounting member, said means becoming disabled to permit withdrawal of the lock cylinder upon movement of the lock cylinder to a predetermined position with respect to the mounting member, and yieldably means, normally inoperative, to prevent movement of the lock cylinder to said predetermined relative position, the insertion of the key moving the yieldable means to operative po-' sition.

4. In a lock device of the character described, a mounting member, a lockv cylinder adapted to receive a key and movable in the mounting member upon the insertion of the key in the performance of its normal locking functions, means for releasably maintaining the lock cylinder assembled with the ablecl to permit withdrawal of the lock cylinder upon movement of the lock cylinder to a predetermined position with respect to the mounting member, and cooperating means carried by the mounting member and the lock cylinder for preventing movement of the lock cylinder to said predetermined position, one of said means being movable to operative position by the engagement of an abutment on the key with a portion thereof during insertion of the key. 1 -5.';In a lockstructure of the character de scribed, a key controlled lock cylinder removable from its mounting member when in a predetermined position, means for pre venting movement of the lock cylinder to said position including an axially movable member, means for normally yieldably main taining theaxially movable member in inoperative position, and means whereby the axially movable member is moved to operative position by the insertion of the key.

6.. In a lock structure of the character de scribed, a key controlled lock cylinder removable from its mounting member when'in a predetermined position, means for preventing movement of the lock cylinder to sa d predetermined position and including an axially movable member, means for normally maintaining the axially movable member in inoperative position, means whereby the member is moved to operative position by the complete insertion of the key, and means for guiding the movement of the axially movable member and providing an interlocking connection with the lock cylinder to receive the stress incidental to limiting the movement of thecylinder. v

7. In a lock device of the character described, a mounting member, a lock cylinder movable in the mounting member in the performance of its normal locking ftmction's upon the insertion of a proper key, means normally maintaining the lockcylinder assembled with the locking member,-saidmeans becominginoperative upon movement of'the lock cylinder to a predetermined position with respect to the mounting member, means for preventing movementof the'lock cylinder to said predetermined position and including a mounting member carried abutment, a movable member, means normally IIltllIltllIllIlg the movable member out of engagement with the abutment, means whereby the movable member is moved into engagement with the abutment by the insertiongo'f the key to free the cylinder for movement, and means for simultaneously guiding the movement of the movable member andtransferring the stress applied to the movable member by a tendency to move the lock cylinder in the direction restricted by the engagement of the movablemember with the mounting member 7 r abutment; I

scribed, a keycontrolled lock cylinder reyond saidpredeterminedlimit-of movement movable-front its mounting member when in to permit its withdrawal.

a predetermined position, means for prevent- In testimony whereof I have hereunto af {1 mg movement ofthe lock cylinder to said fixed my signature. i 0

movable member, means for mounting the axially movable member, said means normal- 1y yieldably maintaining the same in inoper- I ati ve-position, and means whereby the axial-'- ly-movable member is moved to operative po-' 7 sition by the complete insertion of thekey. l

9. In alock of the character described,'-a mountingpmember, a lockcylinder movable in the mounting member in the performance of its normal locking functions upon the in- 7 sertion of a proper key, means for releasably securingthe lock cylinderin the mounting member without interfering with its normal locking. functions and becoming inoperative upon movement of the-lockcylinde'r to a pre- V determinedzposition, means for preventing movement'of the lock cylinder tosaid predetermined positionand including anabutment carried by' the mounting member, a 1 a movable member, spring means mounting the movable'member from the lock cylinder and normallymaintaining the sameout of the path of the mounting member abutment, means whereby the insertion of the key to free the cylinder for movement'moves the movable member into the path of the mounting member abutment, and means for guiding the movement/of the movable member and imparting the stress applied thereto by a forced engagement of the movable member with the mounting member abutment directly to the lock cylinder independent of the spring means.

10.. In a lock structure of the-character described, a mounting member, a lock cylinder having akey slot and being movable inthe mounting member within predetermined limits upon the insertion of a key in the slot, means for releasably maintaining V the-lockcylinder assembled with the mounting-member without interfering with its nor mal locking movements, said means becoming inoperative uponmovement of the lock predetermined:positionincludingan axially EDWARD N J 70 cylinder beyond one of its normal limits of movement, and means preventingmovement l of the lock cylinder beyond said limit of movement and including a member having a :partprojected into the key slot to lie in the'path of a projection formed on the key,

' means yieldably'maintaining the member in inoperative position, the insertion of the key 1 1 and the engagement ofits projection with the member part projected into the key slot .moving the member against its yielding V 1 means to operative'position to prevent move I i V ment. of the lock cylindersbeyond said predetermined limit of movement, and a special key adapted to free the cylinder for movement without moving the movable member 651 whereby the lock cylinder maybe moved bei Q s, I 

